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        <h1 class="post-title" itemprop="name headline">消费者生产者问题的部分代码

          
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              <time title="Created: 2019-10-12 21:52:30 / Modified: 21:53:31" itemprop="dateCreated datePublished" datetime="2019-10-12T21:52:30+08:00">2019-10-12</time>
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        <figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#include&lt;stdio.h&gt;</span></span><br><span class="line"><span class="comment">#include&lt;unistd.h&gt;</span></span><br><span class="line"><span class="comment">#include&lt;stdlib.h&gt;</span></span><br><span class="line"><span class="comment">#include&lt;pthread.h&gt;</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">#define N 100</span></span><br><span class="line"><span class="comment">#define true 1</span></span><br><span class="line"><span class="comment">#define producerNum 10</span></span><br><span class="line"><span class="comment">#define consumerNum 5</span></span><br><span class="line"><span class="comment">#define sleepTime 1000</span></span><br><span class="line">typedef int semaphore;</span><br><span class="line">typedef int item;</span><br><span class="line">item buffer[N]=&#123;0&#125;;</span><br><span class="line">int <span class="keyword">in</span>=0;</span><br><span class="line">int out=0;</span><br><span class="line">int proCount=0;</span><br><span class="line">semaphore mutex=1,empty=N,full=0,proCmutex=1;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">void * producer(void *a)</span><br><span class="line">&#123;</span><br><span class="line">	<span class="keyword">while</span>(<span class="literal">true</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		<span class="keyword">while</span>(proCmutex&lt;=0);</span><br><span class="line">		proCmutex--;</span><br><span class="line">		proCount++;</span><br><span class="line">		<span class="built_in">printf</span>(<span class="string">"生产一个产品ID%d,缓冲区位置为%d\n"</span>,proCount,<span class="keyword">in</span>);</span><br><span class="line">		proCmutex++;</span><br><span class="line">		<span class="keyword">while</span>(empty&lt;=0)</span><br><span class="line">		&#123;</span><br><span class="line">			<span class="built_in">printf</span>(<span class="string">"缓冲区已满!\n"</span>);</span><br><span class="line">		&#125;</span><br><span class="line">		empty--;</span><br><span class="line">		<span class="keyword">while</span>(mutex&lt;=0);</span><br><span class="line">		mutex--;</span><br><span class="line">		buffer[<span class="keyword">in</span>]=proCount;</span><br><span class="line">		<span class="keyword">in</span>=(<span class="keyword">in</span>+1)%N;</span><br><span class="line">		mutex++;</span><br><span class="line">		full++;</span><br><span class="line">		sleep(sleepTime);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">void *consumer(void *b)</span><br><span class="line">&#123;</span><br><span class="line">	<span class="keyword">while</span>(<span class="literal">true</span>)</span><br><span class="line">	&#123;</span><br><span class="line">		<span class="keyword">while</span>(full&lt;=0)</span><br><span class="line">		&#123;</span><br><span class="line">			<span class="built_in">printf</span>(<span class="string">"缓冲区为空!\n"</span>);</span><br><span class="line">		&#125;</span><br><span class="line">		full--;</span><br><span class="line">		<span class="keyword">while</span> (mutex&lt;=0);</span><br><span class="line">		mutex--;</span><br><span class="line">		int nextc=buffer[out];</span><br><span class="line">		buffer[out]=0;</span><br><span class="line">		out=(out+1)%N;</span><br><span class="line">		mutex++;</span><br><span class="line">		empty++;</span><br><span class="line">		<span class="built_in">printf</span>(<span class="string">"\t\t\t\t消费一个产品ID%d,缓冲区位置为%d\n"</span>,nextc,out);</span><br><span class="line">		sleep(sleepTime);</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">int main()</span><br><span class="line">&#123;</span><br><span class="line">	pthread_t threadPool[producerNum+consumerNum];</span><br><span class="line">	int i;</span><br><span class="line">	<span class="keyword">for</span>(i=0;i&lt;producerNum;i++)</span><br><span class="line">	&#123;</span><br><span class="line">		pthread_t temp;</span><br><span class="line">		<span class="keyword">if</span>(pthread_create(&amp;temp,NULL,producer,NULL)==-1)</span><br><span class="line">		&#123;</span><br><span class="line">			<span class="built_in">printf</span>(<span class="string">"ERROR,fail to create producer%d\n"</span>,i);</span><br><span class="line">				<span class="built_in">exit</span>(1);</span><br><span class="line">		&#125;</span><br><span class="line">		threadPool[i]=temp;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="keyword">for</span>(i=0;i&lt;consumerNum;i++)</span><br><span class="line">        &#123;</span><br><span class="line">                pthread_t temp;</span><br><span class="line">                <span class="keyword">if</span>(pthread_create(&amp;temp,NULL,consumer,NULL)==-1)</span><br><span class="line">                &#123;</span><br><span class="line">                        <span class="built_in">printf</span>(<span class="string">"ERROR,fail to create consumer%d\n"</span>,i);</span><br><span class="line">                                <span class="built_in">exit</span>(1);</span><br><span class="line">                &#125;</span><br><span class="line">                threadPool[i+producerNum]=temp;</span><br><span class="line">        &#125;</span><br><span class="line">	void *result;</span><br><span class="line">	<span class="keyword">for</span>(i=0;i&lt;producerNum+consumerNum;i++)</span><br><span class="line">	&#123;</span><br><span class="line">		<span class="keyword">if</span>(pthread_join(threadPool[i],&amp;result)==-1)</span><br><span class="line">		&#123;</span><br><span class="line">			<span class="built_in">printf</span>(<span class="string">"fail to recollect\n"</span>);</span><br><span class="line">			<span class="built_in">exit</span>(1);</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line">	<span class="built_in">return</span> 0;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
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